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Triangle Tube Smart 40 - 36 Gallon - Residential Indirect Water Heater
Model:
SMART 40
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Model: 104589-01
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Factory-Direct
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Features
- Tank-in-Tank Efficiency
- Using boiler water as a heat source for the Smart 40 means that whenever your boiler fires it is providing heat not just for your home, but for your water as well.
- Tank-in-Tank Safety
- High temperatures prevent the growth of bacteria. High quality stainless steel and Triangle Tube's tank-in-tank design allow your domestic hot water to be stored at higher temperatures than traditional water heaters.
- Incredible Recovery Rate
- The large surface area of the inner tank means that water is heated very quickly. Smart Series Indirect Fired water heaters boast a recovery rate up to 300% greater than that of conventional water heaters.
- Self-Cleaning
- The inner tank of the Smart 40 is contoured to promote water movement. This design prevents lime build-up in your water heater and keeps it running efficiently.
Triangle Tube is best known for two things: feats of hydronic innovation and incredibly efficient products. These qualities are intertwined in Triangle Tube's Smart Series Indirect Fired water heaters. The Smart water heaters feature an exclusive "tank-in-tank" design that Triangle Tube has been refining for three decades. To heat domestic water, the outer tank of the Smart 40 fills with boiler water and the surface of the inner tank becomes a heat exchanger. Two inches of polyurethane insulation ensures that your domestic hot water stays hot, and stainless steel construction of the inner tank provides exceptional durability. When it comes to making a decision on your next water heater, the Smart lives up its name.
Specifications
SMART 40

Overview
Product Category
Water Heater - Indirect-Fired
General Information
Type
Indirect Water Heater
Product Line
Smart
Product Category
Water Heater - Indirect-Fired
Medium
Medium
Medium refers to the substance that carries heat through the heating system. Systems are either designed to use either Hot Water or Steam as a medium, and components are usually specific to one or the other.
Hot Water
Fuel Type
Fuel Type
To create heat, some form of fuel is required. Fuel Type specifies what the product uses as an input to create heat.
Indirect Fired
Storage Type
Tank
Coils Quantity
1
Application
Residential
Connection Type
NPT
Capacity
36 Gallons
Performance
First Hour Delivery
First Hour Delivery
Sometimes called First Hour Rating, this is the number of gallons of hot water the heater can supply per hour when starting with a fully heated tank. The recovery of the water heater depends on your boiler's BTU and boiler output temperature.
270 Gallons
Continuous Recovery Rate
240 Gallons
Dimensions
Storage Volume
36 Gallons
Cold Water Inlet
3/4 Inch
Hot Water Outlet
3/4 Inch
Supply Connection
1 Inch
Return Connection
1 Inch
Product Height
46 Inches
Product Width
22 Inches
Product Depth
22 Inches
Product Weight
135 Pounds
Shipping Weight
142 Pounds
Certifications
ETL Listed
Yes
ISO Certified
Yes
Warranty Information
Parts Warranty
Parts Warranty
A warranty is a safeguard from defects in manufacturing and can vary in length and terms. Some manufacturers require registration for extended warranty benefits, be sure to check out features and the warranty document. To see the manufacturer's warranty statement, click on the Manuals tab. Learn More
1 Year
Vessel Warranty
10 Years
Reviews
(15)
Triangle Tube SMART 40 Reviews & Ratings
Customer Photos and Videos



Customer Rating
4.07
(15 Ratings)
69% recommend this product
5
(10)

4
(1)

3
(1)

2
(1)

1
(2)


Smart 40 Review
By Anthony D.
Manlius, New York
Purchased 05/05/2020 |
Review Posted 05/27/2020
The only item I am having a trouble with is the label for the Thermostat it is not placed or located right. If you turn it all the way to the lowest hot water setting, it indicates red or a Scalding temperature setting. I have ordered two more replacement labels so that I can place the new labels in the correct position.
Anthony D. Recommends This
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Rating Breakdown
4/5
4/5
4/5
4/5
Pros:
Fast, Price
Cons:
Wrong Thermostat label position

Better price than any local distributor!!
By David
Ohio
Purchased 10/23/2019 |
Review Posted 11/14/2019
About $1,000 less than my local supply house quoted me. Faster delivery than originally stated and the tank works great.
David Recommends This
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Rating Breakdown
5/5
5/5
5/5
5/5

Works awesome
By Mike A
Ridgefield, Connecticut
Purchased 10/29/2018 |
Review Posted 11/20/2018
We replaced a 15 yr old Triangle Tube 60 gallon which had a pin hole with this new one and its working as expected. I think its a little better
Mike A Recommends This
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Rating Breakdown
5/5
5/5
5/5
5/5

Very happy
By Alex P
Salt Lake City, Utah
Purchased 09/06/2018 |
Review Posted 10/19/2018
Plumbers wanted to mark this product up significantly. I saved a ton of money ordering this directly to my house and just paying to have it installed.
Alex P Recommends This
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Rating Breakdown
5/5
5/5
5/5
5/5

Wow, great product and supplier.
By Brent D.
Napoleon, Ohio
Purchased 08/16/2018 |
Review Posted 09/07/2018
Works very well, nice design and engineering.
Brent D. Recommends This
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Rating Breakdown
5/5
5/5
5/5
5/5

SMART 30
By Greg B.
Phelps, New York
Purchased 09/25/2017 |
Review Posted 10/23/2017
My original water tank was also a Triangle Tube SMART product. I was hoping the fittings would line up to make the install easier but they weren't. That tank lasted over 20 years. I'm hoping this one lasts that long too. I looked at tanks from other manufacturers but this one seemed to be the best value. The free delivery with a liftgate truck was the icing on the cake. I'm happy with my purchase.
Greg B. Recommends This
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Rating Breakdown
4/5
5/5
5/5
5/5

Easy Replacement... Fittings were Standard... Very Pleased!
By Lisa K.
Rodman, New York
Purchased 08/26/2017 |
Review Posted 09/21/2017
Great product. Quick device and shipping. Easy to use website.
Lisa K. Recommends This
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Rating Breakdown
5/5
5/5
5/5
5/5
Pros:
Quiet, Light Weight, Fast, High Quality

Exact fit
By Christopher S.
boston, Massachusetts
Purchased 04/21/2017 |
Review Posted 05/15/2017
Not many replacements are an exact fit but it is on point
Christopher S. Recommends This
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Rating Breakdown
5/5
5/5
5/5
5/5
Pros:
Durable, Fast, Reliable, High Quality
Cons:
Expensive

Reliably Serving Our Household for Last 6 Months
By Stephan H.
Bountiful, Utah
Purchased 09/15/2016 |
Review Posted 03/09/2017



I ordered Triangle Tube's SMART 50 indirect water heater six months ago when my previous tank was near failure and leaking profusely after 23.5 years of service. It was delivered promptly to my home in perfect condition. My plumber installed it that week and it has reliably provided hot water ever since.
I have a boiler system that heats my home via 3 separate circuits, and another circuit dedicated to this tank. My plumber recommended this brand as a result of his experience, and I have been very satisfied so far. This well-insulated tank has reduced my utility bills as well.
I have a boiler system that heats my home via 3 separate circuits, and another circuit dedicated to this tank. My plumber recommended this brand as a result of his experience, and I have been very satisfied so far. This well-insulated tank has reduced my utility bills as well.
Stephan H. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
5/5

Smart 80 makes all the hot water we can use!
By Richard B.
McCall, Idaho
Purchased 11/11/2016 |
Review Posted 12/09/2016
We live in a ski town and though usually only two retirees in the home, we sometimes have 12-15 skiers and snow-players as guests. We need lots of hot water. Our plumber was concerned about the touted online performance rating of the Smart 80 (gallons first hour, etc.).
Not to worry! With proper attention to the pump capacity and boiler supply and return pipe sizing, we are delivering 100,000 BTH/H with our Triangle Tube Prestige 175, and we have all the hot water a 3-bath home can use with this setup. Love the construction, look/feel, and long warranty. Great unit!
Not to worry! With proper attention to the pump capacity and boiler supply and return pipe sizing, we are delivering 100,000 BTH/H with our Triangle Tube Prestige 175, and we have all the hot water a 3-bath home can use with this setup. Love the construction, look/feel, and long warranty. Great unit!
Richard B. Recommends This
Was this review helpful?
Rating Breakdown
5/5
5/5
5/5
4/5
Product Q&A
(2)

Product Questions
Answered by Ken, the eComfort Product Expert
Are both the tank and indirect part made of stainless steel? What is the insulation and its thickness? Is the unit UL listed?
Ramesh
from Florida
May 17, 2016
Please explain "indirect fired." Does it need to be connected to a existing boiler?
Fernando
from District of Columbia
September 13, 2015
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Manuals
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Triangle Tube Smart 40 - 36 Gallon - Residential Indirect Water Heater


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